Cooling means for gyromotors



oct. 14 1924. 1,511,240

E. A. SPERRY ET L.

coomNG MEANS FoR"GYRo MoToRs Or'izinal Filed sept. 16, 191e Patented Oct. 14, 1924.

UNITED STATES 1,511,240A PATENT OFFICE.

ELMER A. SPERRY-AND EDWARD Gr. SPERRY, 0F BROOKLYN. NEW YORK, ASSIGNORS TO THE SPERRY GYROSCOPE COMPANY, OF BROOKLYN, NEW YORK, A CORPORA- TION OF NEW YORK.

COOLING- MEANS FOR GYROMOTORS.

Original application filed September 16, 1918, Serial No. 254,342. Divided and this application led September 9, 1920.

To all wlw/m. t may concern:

Be it known-that we, ELMER A. SPERRY and EDWARD G. SPERRY, citizens of the United States of America, residing at 1505 Allbemarle Road, Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Cooling Means for Gyromotors, of which the following is a specification.

This invention rela-tes to electrically driven gyroscopes of the type employed for stabilizing ships or for other heavy duty. In such gyroscopes it is found highly desirable to rotate the rotor in vacuo, thereby f greatly reducing the windage losses. When such is done, however, the cooling of the driving motor, which is generally built on the rotor shaft, becomes a serious matter since with the air pumped out the cooling effect of the same is also eliminated.

The purpose of this invention is to devise a means for effectively cooling such a gyro driving motor.

The drawing represents an elevation, partly in section, of a typical gyroscopic stabilizer for ships, the drawing being the same as Fig. 1 of our copending application, Serial No. 254,842, filed September 16, 1918, now matured into U. S. Patent 1,387,018 dated August 9th, 1921, of which the present application is a division.

`The gyroscope is shown as mounted on heavy brackets 1 and 2. Large hollow trunnions 2 and 3 extend from opposite sides of the casing 4 of the gyroscope and are journaled on bearings 5 and 6 in said brackets. The casing 4 supports the bearings 7 and 8 for the rotorand also serves to enclose completely the rotor 9, the motorv 10 for driving the same, and all other rotating parts of the gyroscope. A valve and coupling 4 are shown on the casing for the purpose of connecting an exhaust pump to evacuate the casing. The easing is shown as built up of a plurality of sections comprising a centra-l annulus 80 carrying the trunnions 2 and 3 and a pair of conical end portions 81 and 82. The rotor 9 is shown as securely bolted at each side to stub stafts 11 and 12. Shaft 1l is journaled adjacent its upper end in the bearing 7. A ca 1-3 may be provided for the bearing, saidJ cap being provided with an oil Serial N0. 409,190.

outlet 14 from which a pipe 15 leads. Said pipe is preferably provided with a peepsight 16 so that the operator may ascertain whether or not oil is flowing through the pipe. The pipe 15 is s'hown as leading downwardly into a reservoir 116 adjacent the bottom of the gyroscope. Similarly, the lower bearing 8 is provided with an outlet or overflow opening 17 which leads into the reservoir 116. From the reservoir 116 the oil passes to an oil pump 18 through pipe 18. The pump is shown in the form of a centrifugal pump having a turbine wheel 19 mounted on the same shaft 20 with a gear 21. Said gear meshes with a gear 22 on `the shaft 12 of the gyroscope so that the pump is continuously driven. From the pump the oil is led through a pipe 23 into the hollow trunnion 3 of the gyroscope. From thence the oil passes out through a pipe 24 secured to the cap 25 rigidly fixed to trunnion 3 fromk whence the oil normally passes through a swivelV joint 200, through pipes 201, 26 into and through the oil cooler 27 hereinafter described. A peep-sight 90 may also be provided for reservoir 116. A valve 51 is preferably provided in pipe 201.

From the cooler the oil passes through pipe 28 into and through a. strainer 29. From thence the oil is shown as passing through a pipe 30 through the swivel oint 200 into the hollow trunnion 2 through the fixed cap 132. By leading the oil from the stationary parts to the gyroscope through the trunnions in this manner a ready means is provided for introducing a continuous supply of oil or other liquid to the gyroscope without the use of lieXible connections. From the interior of trunnion 2 a portion of the oil is led ythrough a pipe 36 into a chamber 37 under the upper bearing 7. Since the oil is under'pressure it Hows up through the said bearing along the shaft and out at the opening 14 and pipe 15. The sight 16 will show at a glance whether the bearing is immersed in oil or not. The shaft 11 is provided with a disc 40 which closely iits and slides over a plate 41 on the gyroscope casing so that little, if any, oil escapes into the gyroscope. What little oil does trickle through is caught by the annular basin 42 from whence it is carried through the pipe 43 tothe reservoir 116. Oil is supplied `to `the lowerv bearing from trunnion 2 through pipe 44. The thrust bearing which supports the gyro rotor is suppliedwithoil under much'higherpressure" fromV an electrically drivenpump 89 shown as mounted on the gyro casing 4. Said pump is ted from trunnion 2, being shown. connected to pipe44through a` branch' pipe91 From the pump, th e oil is ledintoethef thrust bearing` through -pipe 92.' The-oil isprelf` erably under suicient pressure to entirely support the shaft12 and` albparts secured.. thereto thus urnishingan oil Y'thrust bear-t-- ingq for the shaft. From the saidbearing .the

oil Aescapes into a chamber s 46.. fromx whence it is yforced lup. along the shaft. lQrtogether withlthe oil yfromppip'e 44 through fthe bearingi8 andinto thespace 1'7"..`

n order -tof secure a complete-circulation of the oil.' at the, time.y the f gyroscope is started, we preferwto provide anauXi-liary.

oil pump. 48 which :is connectedtonthe system through pipesI 49: and..50. llVhen the pump 48 is operating thevalve551i maybe closed and valve 51 opened.`

The ,motor is shown in` the-form. of an induction Amotor havinga `stator 6l, secured to the casingand. providedwith windings The., rotor -63 is preferably without windingsfand 1s` shown as mounted.idirectly-v upon the shaft :12. In order to Cool the sta.- torand itswmdings we prefer to provide the `metallicframe. 64 .supportingtthe same` withna channel, which preferably..eXf.A

tends circumferentially. around the frame.-

Cooling fluid` is introduced into.v theV said l channell through. a pipe 68 extending', through the airtight casingf4,.where it is coupled to flexible hose 70; Said fluid is led outwardly from the gyrosoope zthrougl'l similarpiping (noty shown) and. the flexible pipe or` hose 69, softhat accontinuous eircula.-l

tion of water from without the A gyroseope casingV may b-e produced.V

nected toiflexiblehose'() at 170? The ,operationv of our invention, islas ,:tole` f lows Before-ier. atA .the time, the sgyroseope isstartedfup thegoil pumps-48 and 89Aare=e` started.. to. cause aacirculation of .the-` oili through :all Vof the bearings.; The operator byy observing the peep-:sights 16 and 90 may` readily determine f, when 1 the f oil1 i has come Y pletely Hooded the. bearingsf. As the-gyroe scope comes, upi to. speeditheepump 18y will 1 exerbmore andmore pressure until the` pump48ffmay ,be l entirely shut iolf and. lvalve s The` pump 58` may be used: to supply Lsea water for ,cooling themotor; said .pump beingishown -asfconv-f,`

Auxiliary pump 89 Having desc-ribeduour .riniention,what wea,

claim and desire `to secure lebyg Letters Patent is.:

1. The combinationugwith a igyroseopeehav inggarotor, a casinggenclosingfthe sameanid adapted 4to be evacuated,.,antelectrio-mot withinVY said l. casing; for drivingthe glyro.` rotor, .a channel adj acent, .j theeI windings :f ot .a said motor,`- .a :connection from, said .channelv to theA exterior of;saidicas:in,g,.and means for oirculating;ya v cooling t medium: there through- 2; rlhecombinationr withl,aegyroseopehaw inge rotor, a. `celsing;enclosingthe-sameand 1 adapted to be evacuated, means .for 4 mount v ing; ,the same e Jfor f. oscillation about ian lexis.,-

en induction: motor` having` a wound stator; and a. vzrotor i within seid Acasimgor duivinge the gyro rotor, a channel adjacent windings. of seid stator, ateonnection :from saidochane nel to` the. exterior .o- .said-s -casing,- means ,-'or

cireulating, ar coo-ling, med-iumtherethrough and a flexible connection bet-Weense@:cire` culating ,mea-ns and gseid fcasi-nff'.:v`

3. 1 The combin ation` with a ,s g'yroscope/hawYA ing,` a rotor, .a f journal frame. andi bearings forfthesame, motiyemeans for drivingfthe: same, ai circulating#l path* for theV lubricant for:` said bearings, coolinggmeansf for saidH lubricant ini sai-d f' path,. cooling;` means ir; for said motive me anse .and means :for :circulate` ing, coolingfiluid through 4bothfsaid'.;cooling means.

4., The combination ,with a i gyrosoopehav-` coo-ling-AA means.

Inf ,testimony whereof we have ai'iieddour signatures! ELM-.ER A.. SPERR-Y; EDVVARD STEER-X.

inga rotor, ,a journal frame *andibearings;1 'lor ther same,- motive means for drivingethe same,.a1 circulatinigeA patltpfor the.l lubricant fon i saidubearings, cooling meanss, for fsafidi, lubricant in said.` path,1 coolingmeairfisforAv said; motive emeans,l f andifaeJ commormmeanss for.:cireulatingigliquid through both ofsaid.;V 

